text: /*
   * Copyright 2013 Google Inc.
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #ifndef SkLuaCanvas_DEFINED
  #define SkLuaCanvas_DEFINED
  
  #include "SkCanvas.h"
  #include "SkString.h"
  
  struct lua_State;
  
  class SkLuaCanvas : public SkCanvas {
  public:
      void pushThis();
  
      SkLuaCanvas(int width, int height, lua_State*, const char function[]);
      virtual ~SkLuaCanvas();
  
  protected:
      void willSave() override;
      SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override;
      void willRestore() override;
  
      void didConcat(const SkMatrix&) override;
      void didSetMatrix(const SkMatrix&) override;
  
      void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
      virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
                              const SkPaint&) override;
      virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
                                 const SkPaint&) override;
      virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
                                  SkScalar constY, const SkPaint&) override;
      virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
                                    const SkMatrix* matrix, const SkPaint&) override;
      void onDrawTextRSXform(const void* text, size_t byteLength, const SkRSXform xform[],
                             const SkRect* cull, const SkPaint& paint) override;
      virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
                                  const SkPaint& paint) override;
  
      void onDrawPaint(const SkPaint&) override;
      void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override;
      void onDrawRect(const SkRect&, const SkPaint&) override;
      void onDrawOval(const SkRect&, const SkPaint&) override;
      void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override;
      void onDrawRRect(const SkRRect&, const SkPaint&) override;
      void onDrawPath(const SkPath&, const SkPaint&) override;
      void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top, const SkPaint*) override;
      void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst, const SkPaint*,
                            SrcRectConstraint) override;
      void onDrawImage(const SkImage*, SkScalar left, SkScalar top, const SkPaint*) override;
      void onDrawImageRect(const SkImage*, const SkRect* src, const SkRect& dst,
                           const SkPaint*, SrcRectConstraint) override;
      void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
                            const SkPaint*) override;
      void onDrawVertices(VertexMode vmode, int vertexCount,
                          const SkPoint vertices[], const SkPoint texs[],
                          const SkColor colors[], SkXfermode* xmode,
                          const uint16_t indices[], int indexCount,
                          const SkPaint&) override;
  
      void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) override;
      void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) override;
      void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) override;
      void onClipRegion(const SkRegion&, SkRegion::Op) override;
  
      void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;
  
  private:
      lua_State*  fL;
      SkString    fFunc;
  
      void sendverb(const char verb[]);
  
      typedef SkCanvas INHERITED;
  };
  
  #endif
  